When you're in a pinch for smoking devices the best way to go is definitely a fruit pipe. Just take an apple or a pear or a potato or something (heck it would probably work with a watermelon) and make two holes: one from the top to the center and one from the side to the center. Scoop or blow out anything left in the holes until you have one continuous tunnel. Then put a screen on the top opening (if you don't have one just stick your finger up any standard faucet) and put the weed on it. Then smoke.